Warning: mysql fetch error

I am getting this error at the footer of my page.

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /home4/freeprem/public_html/adbrute/class/crdb.php on line 780

I know its a free theme but the owner of the site likes it and i cant get him to change it no matter what i say or do.

Can anyone help point me in the direction of were i should be looking to fix this error as no footer widgets work either.

Sorry for being a total noob, only i have taken over the site and just picking up on the way wordpress works.